physical education. n. (Education) training and practice in sports, gymnastics, etc, as in schools and colleges. Abbreviation: PE. physâ²ical educaâ²tion. n. instruction in sports, exercise, and hygiene, esp. as part of a school or college program.
3. Stress/injury. Stress on the tissues or any type of injury in the mouth can cause canker sores. Since the sores are actually tiny ulcers, they can be caused by any kind of hard brushing or eating something that can cause bruises or lead to tissue inflammation in the mouth.
Little Pimple-Like Bumps on the Inside of the Mouth. Bumps inside your mouth can be canker sores, mucuous cysts, oral lichen planus or inflamed papillae. Small, pimple-like bumps inside your mouth can be caused by multiple conditions, such as canker sores, mucous cysts, oral lichen planus and inflamed papillae. These conditions usually resolve on their own, but certain medications can relieve some of the accompanying pain and discomfort.